In information security, intruder detection refers to the practice of identifying intruders behind assaults as distinct individuals. This method attempts to identify the perpetrator of an attack by examining their computational activity. Modern intrusion detection systems analyze log files, network traffic, and other sources of data for signs of malicious activity.
Intruder detection can be done by using human intelligence. For example, a security guard could watch for suspicious behavior over the computer system or property. Or, a sensor could monitor rooms for unusual movement or heat generation. When an intruder is detected, the system generates an alarm. The security officer can then investigate further or take appropriate action such as calling the police.
Intruder detection can also be done automatically using computer technology. For example, an IDS may use behavioral analysis techniques to look for signs of malicious activity. It can also use event correlation to link seemingly unassociated events that may actually be related. For example, an IDS may notice that someone has logged on to a system but does not know why. If the same person later tries to log off, this may trigger an alert because it is assumed that the user was trying to hide something.
Intrusion detection can be used in any environment where unauthorized users may have access to computers.
When someone tries to get access to any area of your computer system, this is referred to as a computer intrusion. When attempting to attack a computer's security, computer intruders or hackers generally employ automated computer programs. An intruder might attempt to obtain access to your computer in a variety of ways. For example, he or she might use the phone line and dial up your account at an online service provider (such as America Online), try to log on to your account using another user's credentials, or try to upload or change files on one of your computers.
An intruder detection system works by monitoring for unusual activity that may indicate attempted hacking. Many systems will also have some type of alarm capability, such as a siren or flashing light, that can be used as a warning if someone attempts to break in. These alarms can help keep people away from vulnerable areas of your system and allow you time to take measures to prevent them from getting inside in the first place.
In addition to alarm systems, many modern intruder detection systems include features such as image recognition, motion sensors, and vibration sensors. With these additional tools, your system can detect intrusions before you even know something is wrong.
Image recognition technologies scan documents, photographs, and drawings and identify their contents automatically. This technology can help ensure that sensitive information does not reach those who should not see it, for example, children browsing through their parents' personal papers.
An intruder is someone who enters a location without authority. The police can arrest intruders because they have broken the law. An intruder may be a person or something else that has value and therefore tries to enter the not-locked door or window.
In education, an intruder is a student who visits another classroom during class time. The teacher should try to see why the visitor wants to leave their current classroom. If it is not an emergency, then the visitor can be asked to wait until the end of the day so they can visit with all the other students who need to leave at once.
Intruders are also computers viruses. They can enter your computer through a disk drive or online. You must keep your software up to date in order to protect yourself from viruses.
Finally, an intruder is any object that finds its way into your home or office building and not through a door or window. For example, if you notice anything missing when you go home at night, it was probably an intruder! This could be because of a cat that got into someone's yard and stole a toy or cake. Cats cannot get inside buildings so this item must have come from outside.